Based on the measurement of walnut properties, a computational analysis was conducted on the compressive stiffness of the critical value of shell-cracking. As indicated by the results, to crack the walnuts shell from its edge or longitudinal direction could save lots of efforts.The study provided theoretical basis for the design and improvement of walnut shell-cracking machine as well as theoretical references for the design, making and use of some special cracking-assisting tools such as nutcracker.%在测量山核桃属性的基础上,计算分析了其剥壳破碎临界值的压缩刚度.试验结果表明,要节能省力地破碎山核桃,应在纵向或棱向施力.该研究为山核桃破壳机的设计和改进奠定了一定的理论基础,也为山核桃夹这一类专用破壳辅助工具的设计、制造和使用提供了理论依据.
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